Locate it on E-Bay or a large meet such as Carlisle. I have bought several of the 14oz cans for less than $20 a piece. I keep on adding to my stockpile whenever I can.
R134A isn't going to be around forever either. It is being phased out in favor of R1234yf.
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1976 LeMans B09 Freeway Enforcer, 455/M40 Smokey
1977 Trans Am, 400/M21 Black/Gold Bandit. 44K actual miles
2017 Sierra SLT 1500 Z71 4X4 
2019 Canyon SLT Crew 4X4 
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